Granted Patent
Utility
US 5,687,657 · App. 08/629,736
Method of and device for reducing the dust content of the exhaust gases of a steam generator
Inventor:
Geoarg Ziegler
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Apr 9, 1996
Inventor
Geoarg Ziegler
Assignee (at issue)
Asea Brown Boveri, S.A.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.